Which one of the following is NOT an activity attributed to the checkpoint regulated by the G1/S cyclin-CDK complex in mammals?
A. Protein complexes involved in DNA
replication are activated.
B. Radiation damage to DNA activates
phosphorylation of a p53 protein, preventing
its export from the nucleus.
C. Excess p53 in the nucleus increases
expression of an inhibitor of CDK activity.
D. Radiation damage to DNA results in the
inhibition of the G1/S cyclin-CDK complex
and blocks progression of the cell cycle to S
phase.
E. Histone expression is inhibited, allowing
replication to proceed.
E
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A normal urinary system consists of
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DNA is associated with RNA and certain proteins forming chromatin
__________________Indicate whether the statement is true or false.